fig9

Figure 9. (A) In-situ TEM observation, and (B) average number and diameter of Pd particles observed on Pd@ZIF-8 pyrolyzed at 1000 °C for a different time, (C) calculated energy diagram along reaction pathway from Pd cluster to PdN₄^[152], reproduced from Ref.^[152] with permission. Copyright 2018 Springer Nature. (D) Proposed evolution pathway of Fe(Ac)₂ and FeCl₂·4H₂O during thermal treatment, in-temperature Fe K-edge (E)XANES, and (F) EXAFS spectra of the mixture containing Fe(Ac)₂, ZIF-8 and 1,10-phenanthroline monohydrate, (G) in-temperature Fe K-edge EXAFS spectra of the mixture of FeCl₂·4H₂O with (G) carbonized ZIF-8, and (H) SiO₂^[155], reproduced from Ref.^[155] with permission. Copyright 2020 American Chemical Society. Fe K-edge (I) XANES and (J) EXAFS spectra of ZIF-8-NC-0.5Fe pyrolyzed at different temperatures, HAADF-STEM images of (K) ZIF-8-NC-0.5Fe and (L) ZIF-8-NC-0.5Fe-400, (M) EDS spectrum acquired at the marked area in (L)^[49], reproduced from Ref.^[49] with permission. Copyright 2019 Wiley-VCH.